Fig. 8 in A new sediment-dwelling pholadid bivalve from Oligocene glaciomarine sediments of King George Island, West Antarctica

Fig. 8. Paleogene arrangement of Southern Gondwana with distribution of species of Pholadidea in The Weddellian Biogeographic Province from the Late Cretaceous–Paleogene. Abbreviations: 1, Pholadidea (Hatasia) wiffenae, Campanian–Maastrichtian; 2, Pholadidea frenguellii, Eocene; 3, Pholadidea patagonica, Oligocene–early Miocene; 4, Pholadidea gradzinskii, Oligocene; CAS, Central American Seaway; full arrows, possible dispersal route of Pholadidea from New Zealand to Antarctica/South America during the latest Cretaceous and the Paleogene (in the latest Cretaceous situation, New Zealand was immediately adjacent to Australia and Antarctica); stippled arrows, two possible dispersal routes of Pholadidea out from the Weddellian Biogeographic Province. Map adopted after Clarke and Crame (1989).